Stay-bolt structure



Patented Sept. 11, 1923.

IE'IHAN I. DODDS, OF PITTSBU'RGH, IENNSYLVANIA, ASSIGNOB, BY 1VJIESNEASSGN- MENTS, T0 FLANNERY BOLT COMPANY, OF PTTSBURGI-I, PENNSYLVANIA,ACOR PORATION OIE DEI-AWARE.

STAY-BOL'I STRUC'IURE.

Application fi1ed August 2.9, 1919. Serial 1 T0. 320,780.

T0 aZZ whom it may concern:

Be it known that I, ETHAN I. Donns, a citizen of the United States, anda resident of Pittsburgh, in the county of Allegheny ancl State ofPennsylvania, have invented certain new and useful Improvements inStay-Bolt Strnctures; and I do hereby de olare the following to be afull, clear, and exact desoription of the i-nvention, such as willenable others skillecl in the art to which it appertains to make and usethe same.

This invention relates to improvernents in staybolt structures forboilers,the object of the invention being to provide a simple mountingfor the headecl end of a staybolt at the outer boiler sheet, with theuse of a hearing member resting against the onter face of the sheet,thus obviating the necessity of inserting any part of the bearingmernber into or through the boiler sheet, and to enclose said hearingmember in such manner as to prevent leakage and so that necessity orseouring the said bearing member to the boiler sheet shall be rendereclunnecessary.

With this ancl other objects in view, the invention c0nsists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed outin the claims.

In the accompanying drawings; Figure 1 is a sectional view illustratinga staybolt structure embodying my invention, and Figure 2 is a viewshowing the application of my improvements to a boiler sheet from whicha threaclecl sleeve or bushing has been ren1ovecl.

1 represents the onter sheet of a boiler antl 2 the inner sheet. Theouter sheet is proviclecl with openings such as indicated at 3 for theaccommodation of staybolts, such as shown at 4:, and the inner encls ofsaicl staybolts are securecl to the inner boiler sheet in any suitablemanner.

The opening 3 in the outer boiler sheet may be drillecl through thesheet, or it may be the threaded opening 3 from which a threaded bearingsleeve has been removed as shown in Fignre 2, but in either case theopening will have snch form and climensons as to permit the lateralswing or play of the staybolt customary with staybolt structures of theflexible type.

A bearing member in the form ofa ring 5 is proviclecl with a curved seat6 for the roundecl heacl P of the staybolt 4 and the inner portion ofthe inner wall of the ring or bearing member is bevelecl as at 6*. Thering or hearing member 5 rests freely against the outer ace of theoutersheet 1 with ts inner edge portion overlying a portion of the boltopening 3 or 3*. The bearng men1ber thus forrns a ring seat for the boltheacl clisposecl against the boiler sheet.

A cap or closure 7 encloses the annular hearing member or ring 5 andalso the head of the staybolt. The eclge or end of the cap 7 engages theouter face of the boiler sheet 1 and saicl cap is integrally united tothe sheet 1 by a welol 8. This weld is composed of a suitable alloy andis applied around the cap so that it becomes an integral part of boththe oap and the boiler sheet,the integral union of the cap and boilersheet be-. ing thns so intimate that the efiect of leakage of steam pastthe hearing member or the seat of thebolt head thereon will beeffectually prevented.

.It will be bservecl that with my improvements, no special formation ofthe wall of the bolt opening is necessary and that the opening which maypreviously have been occnpiedby a threaded hearing sleeve may beutilized.

My improvements permit a bolt with a small head to be connected with aboiler sheet when the opening in the latter is large as compareol to thesize of the bolt head and facilitates the installation of stayboltswhere the outer boiler sheet is at an angle to the inner boiler sheet.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is

1. In a staybolt structure, the combination with a boiler sheet havingan opening, and a staybolt having a head smaller than saicl opening, ofa bearing member for the head having an opening therein, disposed freelyagainst the outer face of the boiler sheet ancl overlying a portion ofthe opening in the latter, and a cap enclosing said bearing memberandthe head of the bolt and fixed to the boiler sheet.

2. In a staybolt structure, the combine t0n with a boiler sheet havingen opening, and a staybolt having 21, heacl, of a hearing ring restingagainst the outer ace of the boiler sheet and having ts openingapprecably less in diameter than the opening in the boiler sheet, and21, cap fixed to the boiler sheet arouncl saicl hearing ring anclengaging therewith to prevent lateral displacemenc of the letter.

In testirriony whereof, I have"signecl ths specification.

ETHAN I. DODDS.

